2026-02-18
NMN vs NR vs Nicotinamide: First Direct Human Comparison of NAD+ Precursors
A 2025 Nature Metabolism crossover trial directly compared NMN, NR, and nicotinamide in healthy adults. NMN and NR produced sustained blood NAD+ increases of 130–150%; nicotinamide produced only a transient 4-hour rise. Gut microbiome conversion was a key mechanistic finding.
2026-02-17
Caloric Restriction Mimetics in 2025: Multi-Pathway Geroprotectors Under Clinical Evaluation
A 2025 Biogerontology review maps geroprotective compounds targeting AMPK, mTOR, and autophagy pathways. Most remain at biomarker endpoints; hard longevity data in humans is largely absent.
2026-02-17
SIRT3 Activators in Early Clinical Development: Mitochondrial Targets for Aging
SIRT3 is a mitochondrial deacetylase linked to energy efficiency and oxidative stress resistance. Novel small-molecule SIRT3 activators are in preclinical development; human efficacy data does not yet exist.
2026-02-17
NAD+ Precursor Supplementation and Cognitive Fatigue: Mechanism and Human Evidence
NAD+ precursors reliably elevate blood NAD+ in humans and activate mitochondrial energy pathways. Whether this translates to clinically meaningful reductions in cognitive fatigue requires larger, longer trials.
2026-02-10
Nicotinamide Riboside and Nicotinamide: NAD+ Precursor Comparison and Human Trial Evidence
Nicotinamide riboside (NR) and plain nicotinamide both raise NAD+ but through different pathways and with different safety profiles. NR has more published human trials; nicotinamide is cheaper but raises sirtuin-inhibition concerns at high doses.